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Finding the Fourth Proportional to 465.20, 696.88 and 282.16

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Solution

The fourth proportional to 465.20, 696.88 and 282.16 is: 422.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.20 : 696.88 = 282.16 : x
  2. Step 2: Convert to fraction form
    465.20/696.88 = 282.16/x
  3. Step 3: Cross multiply
    465.20x = 696.88 × 282.16
  4. Step 4: Simplify right side
    465.20x = 196,631.66
  5. Step 5: Solve for x
    x = 196,631.66/465.20
  6. Step 6: Final answer
    x = 422.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.